Planooraph co



is. P. BROWN.

HAND HOLE SCRAPER. u APPLICATION HLED D'BT- 31. I913. RENEWED NOV. 8. I918.

1,308,221. Patented Jill 1, 1919.

2 SHEETS-SHEET l- G. P. BROWN. HAND HOLE SCRAPEB.

APPLICATION FILED OCT. 3!, I913- RENEW ED NOV- 3,1918.

1 308,221, Patented Ju1y1,1919.

2 SHEETS-SHEET 2.

'9, I allliiillllllll jfu fill CDLUMIIA PLANOGRAPH CO" WASHINGTON, D. C.

UNITED STATES PATENT OFFICE.

GIDEON PILLOW BROWN, OF LAKE BLUFF, ILLINOIS, ASSIGNOR TO BLANCHE WRIGHT BROWN, OF LAKE BLUFF, ILLINOIS.

HAND-HOLE sonArna.

Specification of Letters Patent Patented July 1, 1919.

Application filed October 31, 1913, Serial No. 798,423. Renewed November 8, 1918. Serial No. 261,715.

To all whom it may concern:

Be it known that I, GIDnoN PILLOW BROWN, a citizen of the United States of America, and resident of Lake Bluff, Lake county, Illinois, have invented a certainnevv and useful Improvement in Hand-Hole Scrapers, of which the followingis a specifi-= cation.

My invention relates to hand hole scrapers 111 general, but more part cularly to those for use in connection with boilers having Another object is to provide certain details and features of improvement tendmg to increase the general efficiency of a hand hole scraper of th1s particular character.

tion cqnsists in matters hereinafter set forth and claimed.

In the accompanying drawings:

Figure 1 is a side elevation of a hand hole scraper embodying the principles of my invention. i h I Fig. 2 is an end elevation of said scraper, showing the .same at work on the edges of the oval hand hole. v

Fig. 3is an outside elevation of the said in Fig.2. 3 p a y Fig. 7 is a perspective ofjthe plate which operates the wedges for engaging the outer surfaces of the boiler, around the hole, to crowd the cutting knives hard against the inner edge portionslof the said hole.

Fig. 8 1s a perspective of an intermediate plate for holding the blades in position.

As thus illustrated, my invention comprises a body A havmg a cami groove a for the rollers a on the radially disposed knives B. These knives slide in guides C ITGITIOV.

ably secured to the inner end of theshaft D, a

by a pin 0 and are of any suitable number. The body or head A is made oval to fit the oval hand hole in the boiler X, and when the shaft is rotated by the handle cl, the knives 13 move out and in, as the rollers a travel in the oval cam groove a. Thus the knives are compelled to follow the oval edge of the hand hole, While the instrument is rotated continuously in one direction. The face 6 of each knife is preferably grooved or corrugated to more effectually out the sub stances away from the seat around the hand hole. The holdingfingers or wedges E are arranged for radial movement, and areheld in place on the body A by means of an oval plate 6, which latter is secured in place by screws 0 inserted in the body A of the scraper. A rotary cam plate F is disposed betweensaid body A and the plate 6. in a recess ainthe body Aand is provided with curved Q1 t1.11g(311t12tl cam grooves f. The rollers e on the fingers E engage in the said grooves f, and said plate F has a hub or sleevef extending outward and over the shaft D. The end of this sleeve 7 has an To these and other useful ends my invening said arm 7 the cam plate F is rotated,

and this causes the fingers E to move outward.

Said fingershave beveled end surfaces 6? that slide over on to the edges of the hand hole, and in this way these fingers act like wedges to pull the scraper outward, causing the knives B to bombard against the inner edgesofthe hole. 1 The means byengagement with the l rackf serves to aholdthe arm f oin adjusted positiomand thus the fingers can be tightened 011 the edges of the hole, from time to time, as the Work progresses. In th1s way the operator does not have to pull on the scraper, but simply turnsthe handle d, and adjusts the arm 7 to keep the knives in. close contact with the inner edges of the hole; a r

The mechanism of the scraper can, of course, be modified orchanged to adapt it for usewith holes of different shapes and sizes. i i l i If desired, the blades B can be separated from the plate A. by an intermediate wearing plate G having an opening 9 for the shaft D and slots 9 for the axles g of the rollers or The said plate can be ofmetal,

. and may-be provided with a thick back portion y, if desired, or may be formed in any other suitable manner. This plate G can be secured 111 place 111 various Ways, as for. ex-

ample by fastening it to the guides C) The plate A has a scat for the plate G, where by the latter is flush with the former. As

shown the Jortion g is much thicker than and 111 the form of a separate the plate plate.

I do not limit myself to the exact con 2. A scraper for cleaning the edges of ovalorother non-circular hand holes, comprising knivesfor engaging the edges of the hole, means for rotating the knives about an axis substantially central of said hole, and a support for said means, serving to keep the scraper in, proper position, held against movement by engagement with the structure around said hole, said support having a cam groove of the same shape as said hole, and said knives having means for engaging said grooves, whereby the knives follow the contour of said hole.

8. A scraper for cleaning the edges of oval or other non-circular hand holes, comprising knives for engaging the edges of the hole, means for rotating the knives about an axis substantially central of said hole, and a support for said means serving to keep the scraper in proper position, held against movement by engagement with the structure around said hole, together with adjustable means for forcing the scraper outward to keep the knives in working engagement with the edges of the hole. v

4:. A scraper for cleaning the edges of oval or other non-circular hand holes, comprising knives for engaging the edges of the hole, means for rotating the knives about an axis substantially central of said hole, and a support for said means, serving to keep the scraperv in proper position,1held against movement by engagement with the structure around said hole, together with movable fingers provided with beveled surfaces for engaging the outer edges of the hole, and means for operating said fingers, serving to keep the knives in working engagement with the inner edges of the hole. 7

5. A' hand hole scraper having knives, means for rotating the knives, Nine-ans for causing the knives to move bodily toward and away from the axis of rotation, in the common plane of said knives, operated by the said rotation, serving to cause the knives actin in con'unction with said hole to su port the scraper in operating position, having provisions operating by rotation about said axis to release said last mentioned means from the hole.

6. A hand hole scraper provided with knives, means for rotating the scraper, pro visions whereby the said knives move bodily toward and away from the axis of rotation, in the common plane of said knives, thereby enabling the knives to follow the shape ii the hole, and means acting in coniunc'l'iim with said hole to support the scraper in operating position, having provisions operat ing by rotation about said axis to release said last mentioned means from the hole.

7 A hand hole scraper having knives for operating on the inner edges of the hole, and readily adjustable means for engaging the struoturearound the hole, on the outside thereof, serving to pull the scraper outward, thereby keeping the knives in working err gagement with the edges of the hole, and a rotary element for causing said means to engage and disengage the structure.

8. A hand hole scraper having knives for operating on the inner edges of the hole. and radially adjustable means for engaging the structure around the hole, on the oulside thereof, serving to .pull the scraper outward, thereby keeping the knives in working ongagement with the edges of the hole. said means including a plurality of radial lingers, a rotary cam plate, means for engaging said cam plate. carried on said fingers, and llllfillls; for rotating said cam plate to cause said fingers to engage the structure.

9. A scraper for cleaning an object having a non-circular edge or rim, comprising a rotary head, a plurality of cutters disposed in position for scraping said object, movably mounted in said head to follow the contour of said edge or rim, a stationary cam for controlling the operation of said cutters, a handle for rotating said head, and means for engaging said edge or rim to prevent relative rotation between said object and said cam during the operation of the scraper, said cam and means being provided with a support in the form of a stationary head, and said object and stationary head being disposed one within the other during operation of the scraper. i

10. A scraper for cleaning an object having a non-circular edge or rim, comprising a rotary head, a plurality of cutters dis posed in position for scraping said object, movably mounted in said head to follow the contour" of said edge or rim, a stationary cam for controlling the operation of said cutters, a handle for rotating said head, and means for engaging said edge or rim to prevent relative rotation between said ll (l object and said cam during the Operation of the scraper, said cutters working at one side at said object when the scraper is in use, and devices for hearing against the other side of said object to draw said cutters into working contact with said edge or rim, said cutters and devices being spaced apart to receive the edge portion of said object.

11. A scraper for cleaning an object having a noncircular edge or rim, comprising a rotary head, a plurality of cutters disposed in position for scraping said object, movably mounted in said head to follow the contour of said edge or rim, a stationary cam for controlling the operation of said cutters, a handle for rotating said head, and means for engaging said edge or rim to prevent relative rotation between said object and said cam during the operation of the scraper, said cam and means being provided with a support in the form of a stationary head having said edge or rim extending around the outside thereof when the scraper is in use, and adjustable devices mounted on said stationary head and engaging said object to force said cutters into working contact with said edge or rim.

12. A scraper for cleaning an object having a non-circular edge or rim, comprising a rotary head, a plurality of cutters disposed in position for scraplng said ObJect, movably mounted in said head to follow the contour of said edge or rim, a stationary cam for controlling the operation of said cutters, a handle for rotating said head, andineans for engaging said edge or rim to prevent relative rotation between said object and said cam during the operation of the scraper, said cam being in the form of a plate having a groove, and said cutters being arranged to slide between said plate and head, each cutter having means for engaging said groove. 1

13. A scraper for cleaning an object having a non-circular edge or rim, comprising a rotary head, a plurality of cutters disposed in position for scraping said object, movably mounted in said head to follow the contour ofsaid edge or rim, a stationary cam for controlling the operation of said outters, a handle for rotatingsaid head, and means for engaging sald edge or run to prevent relative rotation between said object and said cam during the operation of the scraper, said cam being in the form of a plate having a groove, and said cutters being arranged to slide between said plate and head, each cutter having means for engaging said groove, and a wearing plate interposed between said cam and cutters, said wearing plate having slots for permitting said cutters to slide toward and away from the axis of rotation.

14L Ascraper for cleaning an object having a non-circular edge or rim, comprising a rotary head, a plurality of cutters disposed in position for scrapingsaid object, movably mounted in said head to follow the contour of said edge or rim, a stationary cam for controlling the operation of said cutters, a handle forrotating said head, and means for engaging said edge or rim to prevent relative rotation between said object and said cam during the operation oi the scraper, a plurality of lingers for drawing said head forward to keep said cutters in working contact with said object, a rotary plate having cam slots tormoving said fingers into and out of engagement with said object,

and means for rotating said plate.

Signed by me at Chicago, Illinois, this 27th day of October, 1913.

, GIDEON PILLOW BROYVN. lVitnesses RACHEL J. RICHARDSON,

Rose E. SCHNEIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

